CN115468285A - Cold air prevention control method and device for floor heating air conditioner and floor heating air conditioner - Google Patents
Cold air prevention control method and device for floor heating air conditioner and floor heating air conditioner Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 192
- 230000002265 prevention Effects 0.000 title claims abstract description 81
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- 238000010257 thawing Methods 0.000 claims abstract description 44
- 238000012544 monitoring process Methods 0.000 claims description 24
- 238000004378 air conditioning Methods 0.000 claims description 18
- 239000003507 refrigerant Substances 0.000 claims description 11
- 238000007664 blowing Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 7
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- 230000005611 electricity Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 210000004369 blood Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000005485 electric heating Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/12—Tube and panel arrangements for ceiling, wall, or underfloor heating
- F24D3/14—Tube and panel arrangements for ceiling, wall, or underfloor heating incorporated in a ceiling, wall or floor
- F24D3/146—Tubes specially adapted for underfloor heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention provides a cold air prevention control method and device for a floor heating air conditioner and the floor heating air conditioner. The cold air prevention control method comprises the following steps: determining a cold air prevention stage where the floor heating air conditioner is located, wherein the cold air prevention stage comprises a starting cold air prevention stage, a defrosting cold air prevention stage and a fault shutdown restarting cold air prevention stage; different cold air prevention modes are executed based on different cold air prevention stages. By the control method, the multi-split floor heating control can be in a stable and effective cold air prevention mode after low-temperature heating, shutdown and restart and defrosting, the phenomenon that the user experience is influenced by blowing cold air is avoided, and the use comfort of the user is improved.
Description
Technical Field
The invention belongs to the technical field of heating, and particularly relates to a control method and a control device of a floor heating air conditioner and the floor heating air conditioner.
Background
Along with the gradual deepening of the concept of comfortable home furnishing and cooling and heating integration and the progress of the air source heat pump technology, the floor heating air conditioner is more and more popular among common consumers. The floor heating air conditioner applying the air source heat pump technology has two purposes, and is used as an air conditioner cold source in summer and a floor heating heat source in winter. Compared with the traditional heating, the heating device is clean and pollution-free, saves more cost, and completes the household cold and warm decoration with least cost. A main air source heat pump of a floor heating air conditioner is a novel energy-saving and environment-friendly cooling and heating system, and continuously extracts and converts high-grade heat by means of extracting low-temperature heat energy in low-temperature air, taking electric energy as power, taking a compressor as heart and a refrigerant as blood, so as to provide a heat source for indoor heating. Waste gas, waste residue and the like are not generated in the whole extraction and conversion process, the environment is not polluted and damaged, endless and free low-temperature heat in nature is extracted, and the whole system is stable and excellent in operation condition. One part of electric energy and three parts of air energy are used to obtain four parts of heat, so that the heating energy efficiency ratio is very high, and the cost is very low compared with other heating modes.
Although a general air conditioner is high in heating speed, the problem that the comfort of a user is not enough due to large vertical temperature difference of a room, hot air does not fall to the ground and forced convection of air is caused, and floor heating equipment is uniform in indoor temperature gradient under the double-layer effect of radiant heat and layered temperature, high in operation efficiency and widely popularized nationwide. At present, most of the related devices of the floor heating are concentrated in the north, and in the middle and lower reaches of the Yangtze river and in wet and cold areas in the south, due to large heat loss of the enclosure, the radiant heating is slow in heat supply and insufficient in heat supply, when the water temperature is increased, the energy consumption of the air conditioner is increased easily, and the floor heating air conditioner is not particularly popularized. Since the floor heating air conditioner is mainly operated as heating, the problem of preventing cold wind is inevitably involved. The heating air conditioner adopts 'Tianfu ground water', when heating is started in a low-temperature state, because the rising speed of the temperature of the ground heater is low, the primary heating effect depends on the air conditioner in the early stage, the cold air prevention function of the air conditioner needs to be executed at the moment, in addition, when the outdoor unit frosts and frosts need to be changed, the most suitable cold air prevention control method needs to be adopted according to the indoor temperature and the running condition of the ground heater at the moment, the normal running of the cold air prevention function needs to be ensured, the temperature change range of a user needs to be small as much as possible, and the use comfort of the user is improved.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a cold air prevention control method and a control device of a floor heating air conditioner and the floor heating air conditioner, so that the heating control of the floor heating air conditioner can perform a stable and effective cold air prevention function during low-temperature heating and defrosting, the phenomenon that the user experience is influenced by cold air blowing is avoided, and the use comfort of the user is improved.
In order to solve the technical problem, the invention provides a cold wind prevention control method for a floor heating air conditioner, wherein the floor heating air conditioner comprises a floor heating unit and an air conditioning unit, and the cold wind prevention control method comprises the following steps:
when the local heating and air conditioning unit heats, judging whether the air conditioning unit enters a cold air prevention stage or not, wherein the cold air prevention stage comprises a cold air prevention stage at startup, a frost removal and cold air prevention stage and a cold air prevention stage at shutdown and startup again;
and if so, entering a corresponding cold air prevention mode.
Further optionally, an indoor unit of the air conditioning unit is provided with electric auxiliary heat, and the electric auxiliary heat is used for heating to improve the pipe temperature of the indoor unit; in the defrosting and cold wind prevention stage, the cold wind prevention control method comprises the following steps:
controlling the floor heating to continuously heat;
acquiring defrosting time of an air conditioning unit;
judging the interval of defrosting time;
when the defrosting time is longer than or equal to a first preset time, acquiring the indoor environment temperature before defrosting and the corresponding indoor environment temperature;
judging whether the indoor environment temperature before defrosting and the corresponding indoor environment temperature meet a first preset condition or not;
if so, the electric auxiliary heat is turned on in a first manner.
Further optionally, after the electric auxiliary heat is turned on in the first manner, the cold wind prevention control method further includes:
monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and when the pipe temperature of the indoor fan is greater than the pipe temperature threshold value, the electric auxiliary heater is turned off, and the indoor fan is started.
Further optionally, when the indoor environment temperature before defrosting and the corresponding indoor environment temperature do not satisfy the first preset condition, the cold wind prevention control method further includes:
monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and when the pipe temperature of the indoor fan is greater than the pipe temperature threshold value, controlling the indoor fan to start.
Further optionally, the determining whether the indoor environment temperature before defrosting and the corresponding indoor environment temperature meet a first preset condition includes:
judging whether the difference value between the indoor environment temperature before defrosting and the corresponding indoor environment temperature is larger than a preset value or not;
if yes, the first preset condition is considered to be met.
Further optionally, when the defrosting time period is less than the first preset time period and greater than or equal to the second preset time period, the cold air prevention control method further includes:
turning on the electric auxiliary heat in a second manner;
monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and when the pipe temperature of the indoor fan is greater than the pipe temperature threshold value, the electric auxiliary heater is turned off, and the indoor fan is started.
Further optionally, turning on the electrically assisted heat in a second manner comprises:
the electric auxiliary heat comprises a first heating level A, a second heating level B, a third heating level C and a fourth heating level D, the heating capacity of the first heating level is A, the heating capacity of the second heating level B, the heating capacity of the third heating level C and the heating capacity of the fourth heating level D, wherein the heating capacities are as follows: a is more than B and more than C and less than D;
turning on a third heating level of the electric auxiliary heater;
monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and when the pipe temperature of the indoor fan is greater than the pipe temperature threshold value, the electric auxiliary heater is turned off, and the indoor fan is started.
Further optionally, an indoor unit of the air conditioning unit is provided with electric auxiliary heat, and the electric auxiliary heat is used for heating to improve the pipe temperature of the indoor unit; in the stage of fault shutdown and restart and cold air prevention, the cold air prevention control method comprises the following steps:
acquiring indoor environment temperature and corresponding indoor environment temperature when the vehicle is shut down due to faults;
judging whether the indoor environment temperature during the fault shutdown and the corresponding indoor environment temperature meet a second preset condition or not;
if yes, the electric auxiliary heat is started in a first mode, so that the pipe temperature of the indoor unit is larger than a pipe temperature threshold value.
Further optionally, turning on the electric auxiliary heater in a first manner to make the indoor unit tube temperature greater than the tube temperature threshold includes:
turning on a first heating level of electric auxiliary heating;
acquiring a first temperature change rate of the indoor unit pipe temperature, and judging whether the first temperature change rate is greater than a first threshold value;
if not, starting a second heating level of the electric auxiliary heat;
if yes, monitoring the indoor unit pipe temperature, and judging whether the indoor unit pipe temperature is greater than a pipe temperature threshold value.
Further optionally, after the second heating level of the electric auxiliary heat is turned on, the cold wind prevention control method further includes:
acquiring a second temperature change rate of the indoor unit pipe temperature, and judging whether the second temperature change rate is greater than a second threshold value;
if not, starting a fourth heating level of the electric auxiliary heat;
if yes, monitoring the indoor unit pipe temperature, and judging whether the indoor unit pipe temperature is greater than a pipe temperature threshold value.
Further optionally, the air conditioner group is provided with a high-pressure air pipe, part of the high-pressure air pipe is arranged on a floor heating generator of a floor heating system for heat exchange, part of the high-pressure air pipe is provided with an electronic expansion valve, the electronic expansion valve is used for adjusting the refrigerant quantity, and after a fourth heating level of electric auxiliary heating is started, the control method further comprises the following steps:
acquiring a third temperature change rate of the indoor unit pipe temperature, and judging whether the third temperature change rate is greater than a third threshold value;
if yes, monitoring the indoor unit pipe temperature, and judging whether the indoor unit pipe temperature is greater than a pipe temperature threshold value;
if not, the electronic expansion valve is closed, and the opening degree of the electronic expansion valve of the indoor unit is increased, so that all the refrigerant flows into the indoor unit.
Further optionally, when it is determined that the indoor ambient temperature at the time of the downtime and the corresponding indoor ambient temperature do not satisfy the second preset condition, the control method further includes:
monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and when the pipe temperature of the indoor fan is greater than the pipe temperature threshold value, controlling the indoor fan to start.
Further optionally, determining whether the indoor ambient temperature and the corresponding indoor ambient temperature satisfy a second preset condition includes:
judging whether the difference value between the indoor environment temperature and the corresponding indoor environment temperature is greater than a preset value when the vehicle is shut down due to faults;
if yes, the second preset condition is considered to be met.
Further optionally, in the stage of starting up to prevent cold wind, the method for preventing cold wind includes:
monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and when the pipe temperature of the indoor unit is greater than the pipe temperature threshold value, controlling the indoor fan to start.
The present invention also provides a control device for a floor heating air conditioner, comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions, which when executed by the one or more processors, the one or more processors are adapted to implement the method of any of the preceding claims.
The invention also provides a floor heating air conditioner which adopts the method of any one of the technical schemes or comprises the control device of the technical scheme.
After adopting above-mentioned technical scheme, have following beneficial effect:
by the cold air prevention control method, the floor heating air conditioner can automatically execute the corresponding cold air prevention modes at different cold air prevention stages, so that the heating control of the floor heating air conditioner can perform a stable and effective cold air prevention function when heating and defrosting are performed at low temperature and the floor heating air conditioner is stopped and restarted due to faults, the phenomenon that the user experience is influenced by blowing cold air is avoided, and the use comfort of the user is improved. The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 shows a schematic structural diagram of a floor heating air conditioner according to an embodiment of the invention.
Fig. 2 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Fig. 3 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Fig. 4 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Fig. 5 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Fig. 6 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Fig. 7 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Fig. 8 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Fig. 9 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
The system comprises a compressor 1, an oil separator 2, a first four-way valve 3, a second four-way valve 4, a condenser 5, a condensing fan 6, a heating electronic expansion valve 7, a subcooler 8, a subcooler 9, a subcooler electronic expansion valve 10, a gas-liquid separator 12, a high-pressure gas pipe valve 13, a gas pipe valve 14, a liquid pipe valve 15, a floor heating generator 15, a plate heat exchanger 16, a generator electronic expansion valve 17, an indoor unit 18, an indoor unit electronic expansion valve 21, an indoor fan 24 and electric auxiliary heat 33.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to enable the floor heating air conditioner to be capable of performing stable and effective cold air prevention modes in different running states, the embodiment provides a cold air prevention control method of the floor heating air conditioner. The floor heating air conditioner is preferably a multi-split floor heating air conditioner. With reference to the schematic structural diagram of fig. 1, the floor heating air conditioner includes a floor heating unit and a plurality of indoor units 18, taking the indoor unit 18 as an example, the floor heating air conditioner includes an indoor fan 24 and an indoor unit electronic expansion valve 21, and the indoor unit electronic expansion valve 21 is disposed on a refrigerant pipeline and used for controlling refrigerant quantity. In addition, an electric auxiliary heater 33 is arranged in the air inlet direction of each indoor fan, and the electric auxiliary heater 33 is used for heating to improve the pipe temperature of the indoor fan. In addition, the ground heating system is provided with a ground heating generator 15, the ground heating generator 15 comprises a plate type heat exchanger 16, the air conditioning unit is provided with a high-pressure air pipe, part of pipelines of the high-pressure air pipe are arranged in the plate type heat exchanger 16 and are used for carrying out heat exchange with a ground heating water system, part of pipelines of the high-pressure air pipe are provided with generator electronic expansion valves 17, and the quantity of refrigerants used for carrying out heat exchange with the ground heating system can be adjusted by adjusting the opening degree of the generator electronic expansion valves 17. It is understood that when the electronic expansion valve 17 is closed, the refrigerant cannot flow to the plate heat exchanger 16.
The cold air prevention control method of the floor heating air conditioner of the embodiment is described below with reference to fig. 2 to 9.
With reference to the flow diagrams of fig. 2 and 9, the control method of the present embodiment includes steps S1 to S2, where:
the method comprises the following steps of S1, determining a cold air prevention stage of the floor heating air conditioner, wherein the cold air prevention stage comprises a starting cold air prevention stage, a defrosting cold air prevention stage and a fault shutdown restarting cold air prevention stage;
and S2, executing different cold air prevention modes based on different cold air prevention stages.
Further optionally, with reference to the flow diagrams in fig. 3 and 9, the indoor unit of the air conditioning unit is provided with electric auxiliary heat, and the electric auxiliary heat is used for heating to increase the pipe temperature of the indoor unit; in the defrosting and cold wind preventing stage, the cold wind preventing control method comprises S20-S25, wherein:
s20, controlling the floor heating to continuously heat;
s21, acquiring defrosting time of the air conditioning unit;
s22, judging the interval of defrosting time;
specifically, the defrosting time length is compared with a first preset time length (marked as Y1) and a second preset time length (marked as Y2) to judge the interval of the defrosting time length, wherein Y1 is more than Y2;
s23, when the defrosting time is longer than or equal to a first preset time Y1, acquiring the indoor environment temperature before defrosting and the current indoor environment temperature;
s24, judging whether the indoor environment temperature before defrosting and the current indoor environment temperature meet a first preset condition or not; if yes, executing S25;
further optionally, with reference to the flowchart of fig. 4, step S24 includes S241 to S242, where:
s241, judging whether the difference value between the indoor environment temperature before defrosting and the current indoor environment temperature is larger than a preset value (marked as X); if yes, go to S242;
s242, determining that a first preset condition is satisfied;
and S25, turning on the electric auxiliary heater in a first mode.
When the defrosting time is longer than or equal to the first preset time Y1, the defrosting time is longer. At the moment, whether the difference value between the ambient temperature in the air-conditioning defrosting shutdown front chamber and the current indoor temperature is larger than X is judged, if the difference value is smaller than or equal to X, the temperature value of the indoor machine pipe is monitored and judged, and electric auxiliary heating is not needed to be started; if the temperature of the indoor unit is larger than X, the electric auxiliary heat is turned on in a first mode to rapidly heat the indoor unit, so that the indoor unit is prevented from blowing cold air, the comfort of the room temperature is improved, energy can be saved, and the energy-saving requirement is met.
Further optionally, after the electric auxiliary heating is turned on in the first manner, the cold wind prevention control method further includes S26 to S27, wherein:
s26, monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and S27, when the pipe temperature of the indoor fan is greater than the pipe temperature threshold value, the electric auxiliary heater is turned off, and the indoor fan is started.
After the air conditioner with heating up opens electricity with first mode and assists the heat, indoor machine pipe temperature will obtain promoting, when indoor machine pipe temperature is greater than the pipe temperature threshold value, thinks that indoor machine pipe temperature satisfies cold-proof wind demand, closes electricity at this moment and assists the heat, and air conditioning unit normally starts, and indoor fan is normal air-out. In order to avoid cold air from the indoor unit, a person skilled in the art can set a suitable tube temperature threshold, which is not specifically limited herein.
Further optionally, with reference to the flowchart of fig. 6, turning on the electric auxiliary heater in the first manner in step S25 includes steps S251 to S254, where:
s251, starting a first heating level of the electric auxiliary heat;
s252, acquiring a first temperature change rate of the indoor unit pipe temperature; judging whether the first temperature change rate is greater than a first threshold value; if not, executing S253, if yes, executing S254;
s253, starting a second heating level of the electric auxiliary heating;
and S254, monitoring the indoor unit pipe temperature, and judging whether the indoor unit pipe temperature is greater than a pipe temperature threshold value.
Further optionally, after the second heating level of the electric auxiliary heater is turned on, the cold wind prevention control method further includes S255 to S256, where:
s255, acquiring a second temperature change rate of the indoor unit pipe temperature, and judging whether the second temperature change rate is greater than a second threshold value; if not, executing S256; if yes, go to S254;
and S256, turning on a fourth heating level of the electric auxiliary heating.
Further optionally, after the fourth heating level of the electric auxiliary heater is turned on, the control method further includes S257 to S258, where:
s257, acquiring a third temperature change rate of the indoor unit pipe temperature, and judging whether the third temperature change rate is greater than a third threshold value; if yes, executing S254, otherwise executing S258;
and S258, closing the electronic expansion valve of the generator and increasing the opening of the electronic expansion valve of the indoor unit so as to enable all the refrigerant to flow into the indoor unit.
Open the heating level of electricity auxiliary heating step by step in this embodiment, heat indoor machine pipe temperature, can ensure on the one hand that warm up the air conditioner and at the anti-cold wind demand of defrosting under the longer condition of time, improve the user and use the travelling comfort, on the other hand can avoid out hot-blast, satisfy energy-conserving demand simultaneously. Specifically, the first heating level of the electric auxiliary heater is started, whether the temperature rise effect at the moment is good or not is judged according to the indoor unit tube temperature rise rate, if the first heating level is larger than a first threshold value V1, the indoor unit tube temperature can be directly judged, and if the first heating level is not met, the adjustable electric auxiliary heater is increased to the second heating level, so that the temperature rise effect of the indoor unit tube temperature is improved. Further, if the indoor unit temperature rise rate at this time still does not meet the requirement, the adjustable electric auxiliary heat is continuously increased to a fourth heating level, preferably, the fourth heating level is the maximum heating level of the electric auxiliary heat, that is, the heating capacity is 100%, so that the indoor unit temperature is rapid. Therefore, cold air outlet of the indoor unit can be effectively prevented from being energy-saving, and the situation that hot air is directly heated at a larger heating energy level and is discharged can be avoided, so that the comfort is higher.
Further optionally, when the indoor environment temperature before defrosting and the current indoor environment temperature do not satisfy the first preset condition, that is, when a difference between the indoor environment temperature before defrosting and the current indoor environment temperature is less than or equal to X, the cold air prevention control method further includes S28 to S29, where:
s28, monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and S29, controlling the indoor fan to start when the pipe temperature of the indoor fan is greater than the pipe temperature threshold value.
Further optionally, with reference to fig. 3, the cold wind prevention control method further includes S30 to S32, where:
s30, when the defrosting time is shorter than a first preset time Y1 and longer than or equal to a second preset time Y2, turning on the electric auxiliary heater in a second mode;
s31, monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and S32, when the pipe temperature of the indoor fan is greater than the pipe temperature threshold value, closing the electric auxiliary heater and starting the indoor fan.
Further optionally, the electric auxiliary heat has a first heating level a, a second heating level B, a third heating level C and a fourth heating level D, the heating capacity of the first heating level is a, the heating capacity of the second heating level B, the heating capacity of the third heating level C and the heating capacity of the fourth heating level D, wherein the heating capacities are: a is more than B and more than C and less than D;
in the embodiment, the electric auxiliary heat is preferably adjustable electric auxiliary heat, and different temperature rise effects can be realized by adjusting the heating grade of the electric auxiliary heat, so that the cold air prevention requirements of different degrees are met. Preferably, the electric auxiliary heat has the four heating levels, and the heating capacities of the four heating levels are sequentially improved.
Further optionally, in step S30, the electric auxiliary heater is turned on in a second manner, specifically:
the third heating level of the electrically assisted heat is switched on.
When the defrosting time is between the first preset time and the second preset time, the defrosting time is relatively short, and at the moment, the heating can be carried out at a relatively large heating level, so that the temperature of the indoor unit pipe can be quickly increased, and cold air is prevented from being discharged.
Further optionally, with reference to the flow diagrams of fig. 5 and 9, in the step of shutdown, restart, and cold wind prevention, the cold wind prevention control method includes S33 to S35, where:
s33, acquiring the indoor environment temperature during the fault shutdown and the current indoor environment temperature;
s34, judging whether the indoor environment temperature during the fault shutdown and the current indoor environment temperature meet a second preset condition; if yes, executing S25;
further optionally, with reference to fig. 7, S34 includes S341 to S342, where:
s341, judging whether the difference value between the indoor environment temperature during the fault shutdown and the corresponding indoor environment temperature is greater than a preset value X; if yes, go to S342;
s342, determining that a second preset condition is satisfied;
and S25, turning on the electric auxiliary heater in a first mode.
After the air conditioner is stopped and restarted due to faults, for example, high-temperature protection and overcurrent protection can cause the air conditioning unit to be stopped, and after the air conditioning unit is restarted, a corresponding cold air prevention mode needs to be executed. In the mode, if the difference value between the indoor environment temperature when the engine is stopped due to a fault and the current indoor environment temperature is larger than a preset value X, the electric auxiliary heat is started in a first mode to enable the temperature of the indoor machine pipe to be rapidly increased, if the difference value is smaller than or equal to X, the temperature value of the indoor machine pipe only needs to be monitored and judged, and the electric auxiliary heat does not need to be started; therefore, the indoor unit can be prevented from blowing cold air, the room temperature comfort is improved, the energy can be saved, and the energy-saving requirement is met.
The skilled person can select a suitable preset value X according to the requirement, and the preferred value range in this embodiment is 4-6 ℃, and the typical value is 5 ℃.
It can be understood that after the electric auxiliary heater is turned on in the first mode, when the pipe temperature of the indoor unit is monitored to be greater than the pipe temperature threshold value, the electric auxiliary heater is turned off, and the indoor fan is turned on.
Further optionally, with reference to the flowchart of fig. 6, turning on the electric auxiliary heater in the first manner in step S25 includes steps S251 to S254, where:
s251, starting a first heating level of the electric auxiliary heat;
s252, acquiring a first temperature change rate of the indoor unit pipe temperature; judging whether the first temperature change rate is greater than a first threshold value; if not, executing S253, if yes, executing S254;
s253, starting a second heating level of the electric auxiliary heating;
and S254, monitoring the indoor unit pipe temperature, and judging whether the indoor unit pipe temperature is greater than a pipe temperature threshold value.
Further optionally, after the second heating level of the electric auxiliary heat is turned on, the cold wind prevention control method further includes S255 to S256, where:
s255, acquiring a second temperature change rate of the indoor unit pipe temperature, and judging whether the second temperature change rate is greater than a second threshold value; if not, executing S256; if yes, go to S254;
and S256, turning on a fourth heating level of the electric auxiliary heating.
Further optionally, after the fourth heating level of the electric auxiliary heat is turned on, the control method further includes S257 to S258, where:
s257, acquiring a third temperature change rate of the indoor unit pipe temperature, and judging whether the third temperature change rate is greater than a third threshold value; if yes, executing S254, if not, executing S258;
and S258, closing the electronic expansion valve of the generator, and increasing the opening of the electronic expansion valve of the indoor unit so as to enable all the refrigerants to flow into the indoor unit.
Open the electric heating level of assisting heat step by step in this embodiment, heat indoor quick-witted pipe temperature, can ensure on the one hand that warm up the anti-cold wind demand of air conditioner after the start-up is stopped to the fault, improve user's use travelling comfort, on the other hand can avoid going out hot-blast, satisfy energy-conserving demand simultaneously. Specifically, open the first heating level of electricity auxiliary heating, according to indoor set pipe temperature rise rate, judge whether the temperature rise effect at this moment is good, if be greater than first threshold value V1, then directly judge indoor set pipe temperature can, if unsatisfied then increase adjustable electricity auxiliary heating to second heating level to promote the temperature rise effect that makes indoor set pipe temperature. Further, if the indoor unit tube temperature rise rate at this time does not meet the requirement, the adjustable electric auxiliary heat is continuously increased to a fourth heating level, preferably, the fourth heating level is the maximum heating level of the electric auxiliary heat, that is, the heating capacity is 100%, so that the indoor unit tube temperature is rapid. Therefore, cold air outlet of the indoor unit can be effectively prevented from being energy-saving, and the situation that hot air is directly heated at a larger heating energy level and is discharged can be avoided, so that the comfort is higher.
Further optionally, with reference to fig. 5, when it is determined that the indoor ambient temperature at the time of the downtime and the corresponding indoor ambient temperature do not satisfy the second preset condition, the control method further includes S35 to S36, where:
s35, monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and S36, controlling the indoor fan to start when the pipe temperature of the indoor fan is greater than the pipe temperature threshold value.
Further optionally, with reference to fig. 8 and 9, in the stage of starting up, the method for controlling cold wind prevention includes the following steps:
monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and when the pipe temperature of the indoor fan is greater than the pipe temperature threshold value, controlling the indoor fan to start.
Specifically, the multi-split floor heating air conditioner is started in a heating mode, and enters cold air prevention control logic judgment. In the initial stage of low-temperature heating start (air conditioning unit is singly opened), the indoor unit tube temperature (T1) is detected, and the indoor unit tube temperature T1 > T1 (namely, the tube temperature threshold value) is judged, and when the judgment result is that: the unit is normally started to operate, and the indoor unit normally exhausts air. When the judgment result is negative: the inner fan is not started, and the temperature T1 of the indoor unit pipe is continuously detected. Therefore, the floor heating air conditioner can be effectively prevented from generating cold air in the low-temperature heating stage during starting, and the heating comfort is improved.
Specifically, the indoor unit pipe temperature T1 and the current indoor environment temperature T2 are both variables, and may be obtained in real time or at certain time intervals. In this embodiment, when the corresponding cold air prevention mode is executed at different cold air prevention stages, the indoor unit tube temperature T1 and the current indoor environment temperature T2 all need to be monitored, and those skilled in the art can understand that these are variables.
Through the cold wind prevention control method of the embodiment, the floor heating air conditioner can automatically execute the corresponding cold wind prevention modes in different cold wind prevention stages, so that the heating control of the floor heating air conditioner can stabilize the effective cold wind prevention function when the floor heating air conditioner is heated at a low temperature and defrosted and is shut down and restarted due to faults, the phenomenon that the user experience is influenced due to the fact that cold wind blows is avoided, and the use comfort of the user is improved.
The present embodiment also provides a control device of a floor heating air conditioner, which includes one or more processors and a non-transitory computer readable storage medium storing program instructions, when the one or more processors execute the program instructions, the one or more processors are used for implementing the method of any one of the foregoing embodiments.
The embodiment also provides a floor heating air conditioner which adopts the method in any one of the previous embodiments or comprises the control device in the previous embodiment.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
Claims (16)
1. A cold-wind prevention control method for a floor heating air conditioner is characterized by comprising the following steps:
determining a cold air prevention stage where the floor heating air conditioner is located, wherein the cold air prevention stage comprises a starting cold air prevention stage, a defrosting cold air prevention stage and a fault shutdown restarting cold air prevention stage;
different cold air prevention modes are executed based on different cold air prevention stages.
2. The cold-air preventing control method of claim 1, wherein the indoor unit of the air conditioning unit is provided with electric auxiliary heat for heating to raise a pipe temperature of the indoor unit; in the defrosting and cold wind prevention stage, the cold wind prevention control method comprises the following steps:
controlling the floor heating to continuously heat;
acquiring defrosting time of the air conditioning unit;
judging the interval of the defrosting time;
when the defrosting time is longer than or equal to a first preset time, acquiring the indoor environment temperature before defrosting and the current indoor environment temperature;
judging whether the indoor environment temperature before defrosting and the current indoor environment temperature meet a first preset condition or not;
if yes, the electric auxiliary heater is turned on in a first mode.
3. The cold wind prevention control method of claim 2, wherein after the electric supplementary heat is turned on in the first manner, the cold wind prevention control method further comprises:
monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and when the pipe temperature of the indoor unit is greater than the pipe temperature threshold value, the electric auxiliary heater is closed, and the indoor fan is started.
4. The control method according to claim 3, wherein when the pre-defrosting indoor ambient temperature and the corresponding indoor ambient temperature do not satisfy the first preset condition, the cold-blast prevention control method further comprises:
monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and when the pipe temperature of the indoor unit is greater than the pipe temperature threshold value, controlling the indoor fan to start.
5. The control method according to claim 4, wherein the determining whether the indoor ambient temperature before defrosting and the corresponding indoor ambient temperature satisfy a first preset condition includes:
judging whether the difference between the indoor environment temperature before defrosting and the current indoor environment temperature is greater than a preset value or not;
if yes, the first preset condition is considered to be met.
6. The control method according to claim 2, wherein when the defrosting time period is less than the first preset time period and greater than or equal to a second preset time period, the cool air prevention control method further comprises:
the electrically assisted heat is switched on in a second way.
7. The control method of claim 6, wherein the electrically assisted heat has a first heating level, a second heating level, a third heating level, and a fourth heating level, the first heating level having a heating capacity of A, a heating capacity of B of the second heating level, a heating capacity of C of the third heating level, and a heating capacity of D of the fourth heating level, wherein the heating capacities are: a is more than B and more than C and less than D;
the turning on of the electric auxiliary heat in the second way includes:
turning on a third heating level of the electrically assisted heat;
monitoring the indoor unit pipe temperature and comparing the indoor unit pipe temperature with the pipe temperature threshold value;
and when the pipe temperature of the indoor unit is greater than the pipe temperature threshold value, the electric auxiliary heater is closed, and the indoor fan is started.
8. The control method according to any one of claims 1 to 7, characterized in that an indoor unit of the air conditioning unit is provided with electric auxiliary heat for heating to raise the indoor unit pipe temperature; in the stage of the fault shutdown and restart cold air prevention, the cold air prevention control method comprises the following steps:
acquiring indoor environment temperature during fault shutdown and current indoor environment temperature;
judging whether the indoor environment temperature during the fault shutdown and the current indoor environment temperature meet a second preset condition or not;
if so, the electric auxiliary heater is started in a first mode so that the indoor unit pipe temperature is greater than a pipe temperature threshold value.
9. The method as claimed in claim 8, wherein said turning on said electric auxiliary heat in a first manner to make said indoor unit tube temperature greater than a tube temperature threshold comprises:
turning on a first heating level of the electrically assisted heat;
acquiring a first temperature change rate of the indoor unit pipe temperature, and judging whether the first temperature change rate is greater than a first threshold value;
if not, starting a second heating level of the electric auxiliary heat;
if yes, monitoring the indoor unit pipe temperature, and judging whether the indoor unit pipe temperature is greater than the pipe temperature threshold value.
10. The control method of claim 9, wherein after the second heating level of the electric auxiliary heat is turned on, the cold-wind prevention control method further comprises:
acquiring a second temperature change rate of the indoor unit pipe temperature, and judging whether the second temperature change rate is greater than a second threshold value;
if not, starting a fourth heating level of the electric auxiliary heat;
if yes, monitoring the indoor unit pipe temperature, and judging whether the indoor unit pipe temperature is greater than the pipe temperature threshold value.
11. The control method according to claim 10, wherein the air conditioning unit is provided with a high pressure air pipe, a part of the high pressure air pipe is arranged in a floor heating generator of the floor heating for heat exchange, a part of the high pressure air pipe is provided with an electronic expansion valve, the electronic expansion valve is used for adjusting the amount of refrigerant, and after a fourth heating level of the electric auxiliary heating is started, the control method further comprises:
acquiring a third temperature change rate of the indoor unit pipe temperature, and judging whether the third temperature change rate is greater than a third threshold value;
if yes, monitoring the indoor unit pipe temperature, and judging whether the indoor unit pipe temperature is greater than the pipe temperature threshold value;
if not, the electronic expansion valve is closed, and the opening degree of the electronic expansion valve of the indoor unit is increased, so that all the refrigerant flows into the indoor unit.
12. The control method according to claim 8, wherein when it is determined that the indoor ambient temperature at the time of the downtime and the corresponding indoor ambient temperature do not satisfy the second preset condition, the control method further comprises:
monitoring the indoor unit pipe temperature, and comparing the indoor unit pipe temperature with a pipe temperature threshold value;
and when the pipe temperature of the indoor unit is greater than the pipe temperature threshold value, controlling the indoor fan to start.
13. The control method according to claim 12, wherein the determining whether the indoor ambient temperature at the time of the downtime and the corresponding indoor ambient temperature satisfy a second preset condition includes:
judging whether the difference value between the indoor environment temperature during the fault shutdown and the corresponding indoor environment temperature is greater than a preset value or not;
and if so, determining that the second preset condition is met.
14. The cold-blast preventing control method of claim 8, wherein in said cold-blast preventing stage at startup, said cold-blast preventing control method comprises:
monitoring the indoor unit pipe temperature and comparing the indoor unit pipe temperature with the pipe temperature threshold value;
and when the pipe temperature of the indoor unit is greater than the pipe temperature threshold value, controlling the indoor fan to start.
15. An anti-cold air control apparatus of a floor heating air conditioner, characterized in that it comprises one or more processors and a non-transitory computer-readable storage medium storing program instructions, when the program instructions are executed by the one or more processors, the one or more processors are configured to implement the method according to any one of claims 1 to 14.
16. A floor heating air conditioner, characterized in that it employs the method of any one of claims 1-14 or comprises the device of claim 15.
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